problem at mfn-2. i did the coach set up (auto) on offense and defense plays. the offense set 40 plays but the defense set less like 17 or so.
navigated back out of that screen then went back to the game plan and tried the def plays auto again, this time was like 15 plays so doesn't set to 40 on auto.
Try it again, it should be working now.
BTW, I've been composing an algorithm to make this play selection intelligent, but it's not intelligent right now. It does give you a random distribution across the play types, so it's better than randomly choosing plays, but it doesn't yet take into account your personnel and your opponent's personnel.